Combined belt-shifting and brake apparatus



(No Model.)

J. THOMSON. COMBINED'BELT SHFTING AND BRAKE APPARATUS. No. 427,449.aftented May 6, 1890.

UNITED STATES )PATENT Ormea.

JOI-IN THOMSON, OF BROOKLYN, NEV YORK.

COMBINED BELT-:SHIFTING AND BRAKE APPARATUS...

SPECIFICATION forming part of Letters Patent No. 427,449, dated May 6,1890.

Application filed March 14, 1890. Serial No. 343,900. (No model.)

To @ZZ whom it may concern:

Be it known that I, JOHN THOMSON, a citizen of the United States,residing at Brookl yn, Kings county, State of New York, have inventedcertain new and useful Improvements in Combined Belt-Shifting and BrakeApparatus, of which the following is a specification.

This is an invention in apparatus for shifting the belt and stopping theily-wheel by a single movement of a lever, and is particularly intendedfor and applicable to printing, stamping, or embossing machinery. Theobject thereof is to obtain an inexpensive but efflcient, quick, andpowerful action with such a construction and disposal of the parts as tobe readily adaptable to exist-ing types of machinery and to the variousconditions met in practice.

In the drawings, Figures 1 and 2 are respectively side and frontelevations of a ilywheel with tight and loose pulleys attached thereto,showing the application of my improvement; and Fig. 3 is atop plan viewof the hand-lever and the brake-shoe.

In the apparatus of this description the efficiency and usefulnesslargely depend upon the convenience for adjustment and the permaneneyand durability of the structure. It should be readily adaptable tofly-wheels and pulleys of different diameters turning in -eitherdirection and to the requirements of individual operators.

In the illustration the fly-wheel 95 may be assumed as revolving fromthe operator, in which instance the pulling' side 96 of the belt is infront; hence it may be shifted or shipped from theopposite or followingside. In the two standards 97, each a duplicate of the `other, whichmaybe directly secured to the :floor or the base of the machine, ismounted a piece of shafting 98. To the backward end of this is securedthe belt-shifting fork 99, properly engaging the belt. To the forwardend of the shaft is likewise secured the handlever 100. By vibrating thehand-lever acting through the shaft to the fork the belt will be shippedfrom the tight pulley 101 te the loose pulley 102, er vice versa. Fromthe hub Of the hand-lever ashort arm 103 extends (like a bellcrank) outunder the fiy-wheel, theextremity of which is formed to approximate asphere or ball 104. Upon this ball is mounted a brake-shoe 105, properlyadapted thereto by a socket-bearing, half in the lower side of the shoeand half in the cap 10G', secured thereto, as by the screws 107. In theface of the shoe two recesses are formed, into which are snugly forcedpieces of semi-elastic material 10S-such as leather, paper, rubber, orwood-but which project above the face of the shoe; hence it will beapparent that when the h and-lever is forced over toward the position109 the material in the face of the shoe will be brought into contactwith the face of the fly-wheel, and that the universal action permittedby the ball-andsocket connection between the shoe and the lever willpermit and insure a prompt and automatic adjustment of the contactingsurfaces. In applying this apparatus to a machine the workman is notrequired to make a close adj ustnient. The standards are iirst broughtto an approximate position and secured. The handle is then forced overto position 109, which is limited or determined by the impact of theshoe against the face of the iiy-wheel. The belt-shifting fork is nextswung on the shaft and secured, as by the set-belt 110, to bring thebelt over to the desired extent upon the loose pulley. The handle isthen reversed as to position 111, the throw of the belt-shifting forkbeing determined in this instance by the adjusting-belt 112 in the shortarm of the lever, which makes contact upon the face of the standard.

In the fitting of the ball and socket no diffi readily operated by apedal, as indicated by dotted out-line 114.

Vithout limiting myself to the precise construction of parts shown, Iclaim- The combination, with the standard and a ICO rocking shaftmounted thereon, of a beitname to this speeioation in the presence ofshifter fork and hand-1ever connected to the two subscribing Witnesses.rocking shaft, the hand-lever having a rightv v angled projection, uponthe extremity of JOHN THOMSON 5 which is mounted, by means of auniversal Vitnesses:

joint,abrakeshoe, substantialiyas described. EDW. K. ANDERTON, Intestimony whereof I have signed my JOHN MCKINNON.

